Rotatable ventilator-hood.



A. M. BASMAN.

ROTA TABLE VENTILATOR HOOD.

APPLICATION flLED AUG. 15, 1913.

1,295,953. Patentd Mar. 4,1919.

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MMM w s, M my 33% wL W ANTHONY M. BASMAN, OF DETROIT, MICHIGAN.

Specification of Letters Patent.

BQTATABLE VENTILATOR-HOOD.

Patented Mar. 4., 19155.

Application filed August 15, 1918. Serial No. 249,946.

To aZZ whom it may concern.

Be it known that I, ANTHONY M. BASMAN, a citizen of the United States,and residing at Detroit, in the county of Wayne and State of Michigan,have invented a new and Improved Rotatable Ventilator-Hood, of which thefollowing a specification.

This invention relates to rotatable hoods adapted to be mounted on theupper ends of yentilator fines or pipes, and its object is to soconstruct a hood that wind blowing against it will pass up inside of thehood and then down and out through a discharge opening in the side awayfrom the-wind. It further consists in a. ventilator hood which will bestrong and rigid in construction, and in which the various parts are sopositioned that air currents passing into said hood through properopenings from the outside will have an asplrating effect upon the air orgases within the ventilating flue or pipe upon which the hood ismounted.

This invention consists, in combination with a thimble constituting apart of the ventilating flue or pipe, of a rotatable member comprisingan outer upwardly tapering shell having a discharge opening and a vaneto hold this opening away from thewind. It further consists in adeflector of cylindrical shape within the shell to compel the aircurrents from the outside to ascend within the shell and then permitthem to pass out through the discharge opening in the shell togetherwith the air and gases ascending in the ventilator pipe.

In the accompanying drawings, Figure l is a side elevation of thisimproved ventilator. Fig. 2 is a view of the same, partly in bottom planand partly horizontal section on the line 1-1 of Fig. 1. Fig. 3 is acentral vertical section on the line 33 of Fig. 2. Fig. 4 is a plan ofthe ventilator.

Similar reference characters refer to like parts throughout the severalviews.

While this rotatable hood may be mounted directly on the upper ends ofventilator pipes or flues, I prefer to provide a cylindrical thimble 1which will fit such pipes or flues. On this thimble, the hood will-berotatably mounted in any desired manner but for hoods of moderatedimensions I prefer to secure an upright rod or shaft 2 in positionwithin the thimble by means of the braces 3 and 4, each preferablyprovided with three arms.

The hood is made up of a cap 5, a vane 6 secured to the top of the cap,a shell 7 and a cylindrical deflector 8. The cap 5 is substantiallyconical with a flattened portion under the vane and in the center on thein side is'secured the socket 9 to receive the bearing balls 10, therecess for the balls being deep enough to receive the upper end of therod 2 and thereby properly position the hood. Ext-ending down from thissocket are the straps 12 (preferably three) which are connected at theirlower ends to the de flector 8. One side of the hood (the left in thedrawings) will always be toward the wind and the opposite side anddischarge opening will always be away from the wind. In this descriptionand claims he former will be termed the windward and the latter theleeward side of the hood.

The lower end of this deflector is a complete cylinder 13 and is onlyslightly larger than the upper end of the thimble 1 around which itturns freely and by which it is centered. This deflector extends up intothe shell and is connected to the lower part of the shell by the vanes14, 15 16 and 17 which are parallelto the line 33 of Fig. 2 near thatline but deflect therefrom as they near the flattened portions 18 of theshell. The shell isspaced away at the bottom around the deflector 8between the edges of the horizontal plate 19 which edges are paralleland tangential to the deflector 8.

The vertical leeward edges 20 of the sheet constituting the hood arealso parallel to each other and to the edges of this plate 19 to whichthey are attached. Inclined slats 22 may extend between the edges 20across the discharge opening 25 of this ventilator hood, but these slatsmay be omitted if desired, their office being only to stiffen thestructure and to shed rain when the hood is in the open air.

The cap 5 is formed with a substantially flat lip 24 which extendsacross the top of the discharge opening 25. It will be noticed that thevane 6 is central with the discharge opening. The deflector 8 is not acomplete cylinder but the distance across between the bottom of itsupright edges 26 is substantially the Width of the discharge opening 25.The bottoms of these vertical edges 26 are preferably bent out parallelto each other and attachto the parallel edges of the plate 19. Thisplate is formed with a flange 21 that extends down into the cylindricalband 13 to which it is secured. The action of this hood is as follows. 7

The vane 6 will hold-the opening'25 leeward of the wind so as to take.advantage of what aspirating efi'ect there maybe. As the shell 7 of thehood tapers upwardly, the spaces betweenthe shell 7, the deflector 8 andthe vanes 14: to 17 will, taper upwardly. The positions of these vanesare such and the spaces between them taper in such a manner thatcomparatively strong jets of air will rise I around one half thecircumference of the deflector and these jets will together have asiphoning action on the gases in the thimble 1. These jets will strikeagainst thecap 5 and be deflected toward the only portion where thereare no jets,.that is, toward the opening 25. In addition, the air orwind which is caught between the lower portions ofthe flat sides 18 oftheshell and the vanes 17 will also pass up into the hood and at oncepass out laterally through the opening 25, producing an aspiratingeffecton the gases and air within the deflector and the thimble 1,

Theproportions and sizes of the various parts may all be changed' bythose skilled in the art without departing from-the scope of myinvention as defined by the following claims.

I claim 2- 1 I 1. A rotatable ventilator hood comprising an upwardlytapering shellha-ving a side the-shell and of less diameter'than theshell, and vanes'between that portion of the shell which is opposite thesideopening therein and the deflector and constituting upwardly taperingair-passages, said deflector termi- Gopies of this patent may beobtained for nating in line with said side opening in the shell, andmeans to rotatably support sald hood.

2. A-rotatable'ventilator hood comprising a shell having a side openingand means whereby wind may turn the shell so that said opening will beon the leeward side thereof, a semi-cylindrical deflector extending upinto saidshell and having a portion of its edges extending substantiallyuprightly and connecting to the hood at the edges of said opening, a capfor the shell, upright vanes between the shell and deflec: tor, andmeans to rotatably support the hood.

' 3. A rotatable ventilator hood comprising an upwardly tapering shellhaving a side .,opening, a substantially conical cap for the gular sideopening, the edges of the vshell adjacent the opening extendingupwardly, a cap for theshell having that portion adjacent theopeningextending horizontally, a

cylindricaldeflector extending up into the shell andterminatingsubstantially at the middle of the height ofpsaid opening;and vauesbetweenthe portions of the shell and deflector-opposite saidopening to form tapering air passages.

ANTHONY. M. BASMAN.

five cents each, ,by addressing the Go'mmissionerof Patents, Washington,DI G.

